Praxis II 5511 Science; Questions & Answers
(A+)
Nicholas Copernicus Answer-determined Earth was not center of universe and planets
orbit the Sun...explained seasons and Earths rotation on its axis
da Vinci Answer-invented hygrometer (measures moisture in air)and invented
anemometer (wind s...
Praxis II 5511 Science; Questions & Answers
(A+)
Nicholas Copernicus Answer-determined Earth was not center of universe and planets
orbit the Sun...explained seasons and Earths rotation on its axis
da Vinci Answer-invented hygrometer (measures moisture in air)and invented
anemometer (wind speed)
Gailileo Galilee Answer-ivnented thermoscope aka thermometer, discovered all objects
fall at same rate, studied orbits of planets and disovered Jupiters moons
Newton Answer-discovered principles of gravity
Leewwenhoek Answer-invented microscope 1670s
Ben Franklin Answer-discovered lightning and static electricty 1750
Watt Answer-invented steam engine 1778
Whitney Answer-invented cotton gin 1794
Darwin Answer-1835 discovered principles of species evolution- on origin of species
, Praxis II 5511 Science; Questions & Answers
(A+)
Mendel Answer-discovered principles of genetics 1865
florence sabin Answer-discovered origins of blood 1917
1st law of thermodynamics Answer-always as much energy after something happens as
there was before it happened
2nd law of thermo Answer-everything directs itself toward the lowest energy state with
the most equal distribution of resources
work Answer-process of an object being moved over a distance in response to some
force being applied
power Answer-rate or measure of the time work can be done (work/time)
, Praxis II 5511 Science; Questions & Answers
(A+)
force Answer-pressure or change applied to an object and includes gravity, electic, and
magnets. can be measured in N or pounds. F=mass*acceleration
speed Answer-how far something travels in a specific time (s=d/t)
potential energy Answer-energy that could possibly do the work if it was released or a
force imposed on the object
kinetic energy Answer-energy that does the work or energy that is recurring
conservation of mass/matter Answer-matter can neither be created or destroyed but it
can be rearranged. sum of matter and energy in universe stays the same
conservation of energy Answer-energy remains constant in a system and cannot be
recreated, but can change forms
conservation of momentum Answer-total momentum remains the same unless acted
upon by an outside force demonstrated by the equation p=mv momentum=mass*velocity
charge conservation Answer-electric charge can neither be created nor destroyed but is
always conserved
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